基于时频峰值滤波的电力线通信噪声消除方法

为了克服电力线通信系统(PLC)中存在的大量噪声，改善低信噪比情况下电力线通信系统通信质量，提高电力线通信系统可靠性，引入时频峰值滤波(TFPF)算法作为电力线通信系统的噪声消除技术。时频峰值滤波算法通过频率调制将电力线含噪信号调制成解析信号的瞬时频率，利用解析信号的Wigner-Ville分布的峰值进行瞬时频率估计，从而恢复有效信号。针对电力线通信系统信号的非线性特性，利用加窗的Wigner-Ville分布实现TFPF。实验证明，在低信噪比情况下，该方法可以有效地消除电力线通信系统噪声，降低误码率(BE

A new noise mitigation method based on time frequency peak filtering in powerline communication system

In order to overcome the impact of different types of noises in the power line communication system (PLC), moreover, improve the low signal to noise ratio (SNR) situation and the reliability of the communication system, this paper presents a noise mitigation method based on time-frequency peak filtering (TFPF). TFPF is the technique that encodes the signal as instantaneous frequency (IF) of an analytic signal by frequency modulated. Then, the signal is recovered by getting peak of WVD of analytic signal according to frequency. For the nonlinearity of the power line communication system data, the WVD added window function is utilized to execute TFPF. Numerical experiments have shown that the TFPF method can effectively eliminate the power line communication system noise, reduce the Bit Error Rate (BER) and improve the quality of communication system.